ephemera
🇺🇸
/ɪˈfemərə/
🇬🇧
/ɪˈfemərə/
short-lived or temporary items, often kept as mementos
The museum displayed a fascinating collection of old postcards, tickets, and other ephemera.
博物館展出了一組迷人的舊明信片、票券和其它短暫事物的收藏。